我正在尝试更新在 Raspberry Pi 4B 上运行的 Ubuntu 服务器 22.10 上的软件包，该服务器被用作远程服务器。DNS 中没有错误，我尝试 ping google.com 并且它工作正常。
--- google.com ping statistics --- 9 packets transmitted, 9 received, 0% packet loss, time 8013ms rtt min/avg/max/mdev = 6.560/6.795/6.941/0.126
我不确定我的 UFW 防火墙端口。如果在打开或关闭任何端口时出现任何错误，请告诉我。
ufw 防火墙状态
root@ubuntu:~# sudo ufw status
Status: active
To Action From
-- ------ ----
10000 ALLOW Anywhere
22/tcp ALLOW Anywhere
80/tcp ALLOW Anywhere
443 ALLOW Anywhere
80 ALLOW Anywhere
53 ALLOW Anywhere
443/tcp ALLOW Anywhere
9200 ALLOW Anywhere
10000 (v6) ALLOW Anywhere (v6)
22/tcp (v6) ALLOW Anywhere (v6)
80/tcp (v6) ALLOW Anywhere (v6)
80 (v6) ALLOW Anywhere (v6)
53 (v6) ALLOW Anywhere (v6)
443/tcp (v6) ALLOW Anywhere (v6)
443 (v6) ALLOW Anywhere (v6)
9200 (v6) ALLOW Anywhere (v6)
显示的错误
root@ubuntu:~# sudo apt-get update
Ign:1 http://download.opensuse.org/repositories/isv:/ownCloud:/server:/10/Ubuntu_21.10 InRelease
Ign:2 http://ports.ubuntu.com/ubuntu-ports kinetic InRelease
Ign:3 https://ppa.launchpadcontent.net/ondrej/php/ubuntu kinetic InRelease
Ign:4 http://ports.ubuntu.com/ubuntu-ports kinetic-updates InRelease
Ign:5 http://ports.ubuntu.com/ubuntu-ports kinetic-backports InRelease
Ign:6 http://ports.ubuntu.com/ubuntu-ports kinetic-security InRelease
Ign:1 http://download.opensuse.org/repositories/isv:/ownCloud:/server:/10/Ubuntu_21.10 InRelease
Ign:2 http://ports.ubuntu.com/ubuntu-ports kinetic InRelease
Ign:3 https://ppa.launchpadcontent.net/ondrej/php/ubuntu kinetic InRelease
Ign:4 http://ports.ubuntu.com/ubuntu-ports kinetic-updates InRelease
Ign:5 http://ports.ubuntu.com/ubuntu-ports kinetic-backports InRelease
Ign:6 http://ports.ubuntu.com/ubuntu-ports kinetic-security InRelease
Ign:1 http://download.opensuse.org/repositories/isv:/ownCloud:/server:/10/Ubuntu_21.10 InRelease
Ign:2 http://ports.ubuntu.com/ubuntu-ports kinetic InRelease
Ign:3 https://ppa.launchpadcontent.net/ondrej/php/ubuntu kinetic InRelease
Ign:4 http://ports.ubuntu.com/ubuntu-ports kinetic-updates InRelease
Ign:5 http://ports.ubuntu.com/ubuntu-ports kinetic-backports InRelease
Ign:6 http://ports.ubuntu.com/ubuntu-ports kinetic-security InRelease
Err:1 http://download.opensuse.org/repositories/isv:/ownCloud:/server:/10/Ubuntu_21.10 InRelease
Temporary failure resolving 'proxyserver'
Err:2 http://ports.ubuntu.com/ubuntu-ports kinetic InRelease
Temporary failure resolving 'proxyserver'
Err:3 https://ppa.launchpadcontent.net/ondrej/php/ubuntu kinetic InRelease
Temporary failure resolving 'proxyserver'
Err:4 http://ports.ubuntu.com/ubuntu-ports kinetic-updates InRelease
Temporary failure resolving 'proxyserver'
Err:5 http://ports.ubuntu.com/ubuntu-ports kinetic-backports InRelease
Temporary failure resolving 'proxyserver'
Err:6 http://ports.ubuntu.com/ubuntu-ports kinetic-security InRelease
Temporary failure resolving 'proxyserver'
Reading package lists... Done
W: Failed to fetch http://ports.ubuntu.com/ubuntu-ports/dists/kinetic/InRelease Temporary failure resolving 'proxyserver'
W: Failed to fetch http://ports.ubuntu.com/ubuntu-ports/dists/kinetic-updates/InRelease Temporary failure resolving 'proxyserver'
W: Failed to fetch http://ports.ubuntu.com/ubuntu-ports/dists/kinetic-backports/InRelease Temporary failure resolving 'proxyserver'
W: Failed to fetch http://ports.ubuntu.com/ubuntu-ports/dists/kinetic-security/InRelease Temporary failure resolving 'proxyserver'
W: Failed to fetch http://download.opensuse.org/repositories/isv:/ownCloud:/server:/10/Ubuntu_21.10/InRelease Temporary failure resolving 'proxyserver'
W: Failed to fetch https://ppa.launchpadcontent.net/ondrej/php/ubuntu/dists/kinetic/InRelease Temporary failure resolving 'proxyserver'
W: Some index files failed to download. They have been ignored, or old ones used instead.
未创建代理服务器，已使用此行代码进行了检查
echo "$http_proxy"
echo "$https_proxy"
env | grep proxy
以上所有内容均未显示任何输出，即使在 sudo nano /etc/apt/apt.conf 中也没有任何内容。
我想让它恢复到以前的正常更新和升级方式，并且我想删除不需要的 UFW 端口，因为这可能会损害服务器的安全。
编辑:::::: 如需进一步讨论和解决方案，请查看 https://ubuntuforums.org/showthread.php?t=2484973&p=14136226#post14136226